On Friday evening, Apple seeded Mac OS X Lion developer preview 3, and today we're hearing about some of the nifty little tweaks and enhancements that have been unearthed so far. Of course, if you haven't already downloaded yours, there's a possibility that you may not be able to so at this time.

Some of the developers we know say the update effectively disappeared from Software Update on machines running March 30th's release of Lion Developer Preview 2. We started hearing this just hours after the release came. And while we had hoped for more information regarding the matter today, few additional details regarding the stalled download process have become available.

More than a few developers have reported problems with the beta - specifically, that it supposedly rendered their systems unable to reboot. It's important to reiterate, however, that there's no confirmation of this problem and certainly not by Apple. These are some of the things we're hearing and reading from developers.

Those who did obtain Lion Developer Preview 3 have reported some obvious and noteworthy changes, including a new boot animation and other aesthetically enhanced graphics and themes. There's also new and improved desktop wallpapers, and - as expected - the Reading List is now enabled in Safari."

Other changes include:

New Reminders menu in iCal

New next desktop button in Dashboard space:

New options when right-clicking (this appears to be buggy at this time):

Compatibility to external displays has been improved (especially in Mission Control)

It was pulled back as soon as it was released, and an email went out NOT to DL/install it BEFORE it was released!. A new version will be released "soon" via the App Store. An email will be sent to us when then happens. So far, it's just a nice upgrade, I'm not really all that excited by it. I just hope it has less issues on final release than SL, which broke FireWire among other things.

You don't have to use the iOS type stuff if you don't want to. Just remove launch pad from the dock. The only thing that you have to use are the iOS type scroll bars.

I wish you could remove scroll bars from Snow Leopard. I dont think I've ever used them, by use I mean clicking on the arrows or dragging the blue bar up/down.
I like the iOS style scroll bars that appear only when scrolling in Lion.

I wish you could remove scroll bars from Snow Leopard. I dont think I've ever used them, by use I mean clicking on the arrows or dragging the blue bar up/down.
I like the iOS style scroll bars that appear only when scrolling in Lion.

That would be cool. I'm one of the few who actually like lions iOS+OS X look.

what i dont like is how switching spaces and scrolling webpages is tied together. If they would just allow me to scroll down on webpages and then swipe right when i want my space to go the the one on the right i'd be happy. But noooooo they're always opposite. my mac isn't a touch screen !

what i dont like is how switching spaces and scrolling webpages is tied together. If they would just allow me to scroll down on webpages and then swipe right when i want my space to go the the one on the right i'd be happy. But noooooo they're always opposite. my mac isn't a touch screen !

you can turn that off...
i am really looking forward to lion even the betas are somewhat buggy here and there i also noticed performance increase in various areas.

Well, I have an iMac 27" Bought around November 2010... I did software update last night and was presented with what I assume to be DP3 update (It just said Lion Developer Preview - but since I was already on DP2 U2 I could only assume it was DP3) ... So installed it and BAM - I can't boot anymore... I'm left with the Apple Logo and the spinning wheel! So this is confirmation 1 lol

Additional info (if it makes any difference)

I have a boot camp partition, and also use ReFit as my boot menu. If I turn the machine on, I get grey screen (no logo) ... then there was a flash of blue (like pre-login I think) then back to grey, with apple logo and pinwheel.

I got this May 13th about 1PM PST. I did NOT! update. I have not yet received the 2nd email saying to go ahead:

"Software Update - Please Do Not Install
Later today a Software Update for Lion will be released. If you are running Mac OS X Lion 10.7 Build 11A444d, a Software Update will appear named Lion Developer Preview Update. Please DO NOT install the Software Update.

We are working on posting a new build in the Mac App Store. Once it is ready we want you to try using the Mac App Store for installing the new build. We need your help making sure the process works as expected.

As soon as the Mac App Store build is available, you will receive an email with new redemption codes and new installation instructions. Until then, please continue testing the current build of Lion, 11A444d, and report any problems you encounter. We would also appreciate any time you can set aside to complete the questionnaires we have posted for this build.